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John Moss (Oak Ridge National Laboratory)MC4.A06: RF power sources and power couplersInvited Talk (Invitation Only)
The continued high-quality scientific output of many research facilities depends directly on their reliable operation and, in taking a wider view, a market that can provide a stable supply. In the late 2010s and early 2020s, market irregularities were amplified in large part because of the COVID-19 pandemic and the disruption it caused in resource availability. Though COVID-19 has been...
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Chuanxiang Tang (Tsinghua University)MC2.A02: Electron linac projectsInvited Talk (Invitation Only)
The inverse Compton scattering (ICS) source based on the collision between high-quality electron beams and laser can generate high-brightness quasi-monoenergetic γ-rays. Our labs have developed a compact MeV quasi-monoenergetic γ-ray ICS source and has successfully commissioned. The VIGAS can generate gamma ray beam with energy can be adjusted from 0.2-4.8MeV, and flux about 10^8...
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Feng Qiu (Institute of Modern Physics, Chinese Academy of Sciences)MC4.A08: Superconducting RFInvited Talk (Invitation Only)
High-intensity superconducting linear accelerators present significant challenges regarding efficiency and reliability during both commissioning and operation. This paper summarizes the engineering practices in full-process automated operation and maintenance implemented for the HIAF-iLinac SRF system. To address the requirements of large-scale cavity commissioning, an automated conditioning...
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Sofia Johannesson (European Spallation Source)MC3.A04: Proton linac projectsInvited Talk (Invitation Only)
In 2025, the beam produced by the European Spallation Source (ESS) accelerator, a 600 m-long superconducting proton machine, first reached the beam dump. This presentation will give an overview over the results achieved during the commissioning rounds in 2025 and 2026, and the challenges remaining for high power and user operation.
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Jayakar Thangaraj (Fermi National Accelerator Laboratory)MC2.A05: Industrial and medical acceleratorsInvited Talk (Invitation Only)
Superconducting linacs have traditionally required large cryogenic infrastructures, while compact accelerators relied on normal-conducting technology. This divide is narrowing. At Fermilab’s IARC, Nb₃Sn-coated cavities operating near 4 K, combined with cryocooler-based conduction cooling and solid-state RF power, enable compact SRF linacs for high-duty-factor operation outside traditional...
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William Graves (Arizona State University)MC2.A04: FELsInvited Talk (Invitation Only)
Arizona State University is developing a compact, room-sized x-ray free electron laser (CXFEL), a far smaller and more affordable alternative to conventional XFELs. The design combines an X-band linac with precise electron-beam phase-space control and an optical undulator to produce coherent x-rays via inverse Compton scattering. This talk will provide an overview of the project, including the...
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Robert Rimmer (Thomas Jefferson National Accelerator Facility)MC2.A05: Industrial and medical acceleratorsInvited Talk (Invitation Only)
Compact, efficient and high-power sources of electrons are of growing interest for a wide range of applications including materials processing, medical device and food sterilization, wastewater and soil treatment. Electron energy from <1MeV to 10 MeV and beam power from kW to MW levels are desirable. We describe a compact modular system being developed at JLab starting with a gridded...
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Erdong Wang (Brookhaven National Laboratory)MC2.A02: Electron linac projectsInvited Talk (Invitation Only)
The Electron–Ion Collider (EIC) requires a 750 MeV pre-injector operating at 30 Hz and delivering polarized electron bunch charges of 1 up to 2 nC. The electron source provides longitudinal polarization, whereas the spin must be vertical prior to injection into the ring. To achieve this, we implement a spin rotator at gun energy. The primary challenge is to preserve polarization and maintain a...
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Alec Gonzalez (Facility for Rare Isotope Beams)MC1.A01: Beam Dynamics, beam simulations, beam transportInvited Talk (Invitation Only)
Ion beams are extracted from the Electron Cyclotron Resonance source with an initial angular momentum. The focusing in the FRIB diver linac is provided by electric and magnetic solenoids and quadrupoles. Understanding the coupled dynamics and proper matching of the beams along the superconducting linac is critical to maintaining high-power, low-loss operation. The errors in the measured 4D rms...
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Chunguang Jing (Euclid Techlabs (United States))MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersInvited Talk (Invitation Only)
We report the first beam produced by the world’s first conduction-cooled superconducting radio-frequency (SRF) photogun. Over the past seven years, Euclid, in collaboration with Fermilab and Argonne National Laboratory, has developed a 1.5-cell, conduction-cooled Nb3Sn SRF photogun operating at 1.3 GHz. The primary objective of this effort is to demonstrate ultra-stable electron beams for...
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Zhencheng Mu (Institute of High Energy Physics)MC4.A06: RF power sources and power couplersInvited Talk (Invitation Only)
The CSNS has newly developed a metamaterial based 324 MHz klystron with R&D launched in 2021 and successful hot testing in June 2025. The metamaterial-loaded cavities enable 55% shorter structure length, and the integrated second harmonic bunching cavity achieves high efficiency， With 3 MW peak output power and 53.1% efficiency. this report shares the latest development of the metamaterial klystron.
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Vaishali Naik (Department of Atomic Energy)MC2.A02: Electron linac projectsInvited Talk (Invitation Only)
VECC, Kolkata, is developing a 50 MeV, 100 kW superconducting electron linac to produce bremsstrahlung gamma rays that will subsequently be used for generating neutron-rich RIBs. The injector comprises a 250 keV electron gun and a pre-buncher. The low energy beam transport line between the gun and the injector includes diagnostic elements for measuring bunch length and beam emittance. The...
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Shichun Huang (Institute of Modern Physics)MC4.A08: Superconducting RFInvited Talk (Invitation Only)
The on-line operating instability of the bulk Nb superconducting cavity is mainly attributed to the following factors: Lorentz force detuning, mechanical vibration, thermal breakdown induced by the electron loading effect and the enhanced heat dissipation at defects etc. Theoretically, the copper-niobium / aluminum-niobium composite superconducting cavities have excellent potential for high...
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Liepeng Sun (Institute of Modern Physics, Chinese Academy of Sciences)MC4.A06: RF power sources and power couplersInvited Talk (Invitation Only)
"As the first institution in China to fully adopt solid-state power sources, the Institute of Modern Physics has developed a new ""standardization"" design concept which has greatly improved the universality and reliability of power source systems. Products from different manufacturers are interchangeable, supporting hot swapping for superconducting systems. The RF structure is simple and...
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Claudio Emma (SLAC National Accelerator Laboratory)MC1.A04 Plasma and wakefield accelerationInvited Talk (Invitation Only)
Published in PRL. Demonstration of experimental generation of high energy (10 GeV), ultrashort (femtosecond-duration), ultrahigh current (∼0.1 MA), petawatt peak power electron beams in a particle accelerator. These extreme beams enable the exploration of a new frontier of high-intensity beam-light and beam-matter interactions broadly relevant across fields ranging from laboratory...
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Mattia Parise (Fermi National Accelerator Laboratory)MC4.A08: Superconducting RFInvited Talk (Invitation Only)
Achieving robotic-assisted string assembly has been a longstanding objective in superconducting cavity production to improve precision, repeatability, and throughput while reducing operator-dependent variability. At Fermilab, robotic systems have been successfully deployed for the installation of individual components on SSR2 cavities inside a cleanroom environment. The single-cavity...
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Austin Hoover (Oak Ridge National Laboratory)MC1.A01: Beam Dynamics, beam simulations, beam transportInvited Talk (Invitation Only)
One-dimensional measurements are used to infer the four-dimensional phase space density of an accumulated proton beam in the Spallation Neutron Source (SNS) accelerator. The reconstruction was performed by maximizing the distribution’s entropy subject to the measurement constraints and thus represents the most conservative inference from the data. The reconstructed distribution reproduces the...
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Erdong Wang (Brookhaven National Laboratory)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersInvited Talk (Invitation Only)
Polarized electron sources are essential for accelerator facilities such as the Electron–Ion Collider and polarized positron sources, which require guns with higher voltage and bunch charge than existing polarized gun. At Brookhaven National Laboratory, we developed an inverted High-Voltage DC (HVDC) polarized photoemission gun with a Distributed Bragg Reflector superlattice GaAs photocathode...
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Masahiro Okamura (Brookhaven National Laboratory)MC1.A03 Other beamsInvited Talk (Invitation Only)
We report on the achievement of a world-record peak beam current for heavy ions through the acceleration of fully stripped carbon ions (C⁶⁺) using a 100-MHz four-rod radio-frequency quadrupole (RFQ) accelerator combined with a Direct Plasma Injection Scheme (DPIS) driven by a laser ion source.
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A peak beam current of 105 mA was successfully accelerated to an output energy of 300 keV/u. The... -
Thomas Lucas (Paul Scherrer Institute)MC1.A02 Electron and ion sources, guns, photo injectors, charge breedersInvited Talk (Invitation Only)
Intrabeam scattering (IBS) in the SwissFEL injector has emerged as a critical performance-limiting phenomenon, manifesting as a significantly larger slice energy spread than previously anticipated. By combining detailed numerical simulations with a newly developed analytical model, we achieve excellent agreement with experimentally measured slice energy spreads, validating our approach. These...
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Yuga Nakazawa (High Energy Accelerator Research Organization)MC1.A03 Other beamsInvited Talk (Invitation Only)
At Japan Proton Accelerator Research Complex (J-PARC), a low-emittance muon beam based on a linear accelerator is being developed for precision measurements of the muon anomalous magnetic moment (g-2) and electric dipole moment (EDM), as well as for non-destructive imaging applications. In the low-velocity section of the muon linac, a 324-MHz radio-frequency quadrupole linac (RFQ) is employed...
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Dr Kazuaki Togawa (RIKEN SPring-8 Center)MC4.A05: Other technologyInvited Talk (Invitation Only)
A new-type high-voltage pulse generator by means of a method of frequency-segmented power amplification was proposed and developed. A seed pulse is divided into several lines that have bandpass filters, variable delay lines, variable power attenuators, and main rf amplifiers to correct the frequency-dependent group delays and gain of the amplifier circuit and to perform fine-tuning of the...
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Sang-hoon Kim (Facility for Rare Isotope Beams)MC4.A08: Superconducting RFInvited Talk (Invitation Only)
The FRIB has extensive experience operating large amounts of low-beta (quarter-wave and half-wave) superconducting resonators. This talk will report overcoming challenges in supporting the SRF system with nearly 100% availability.
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Han-Sung Kim (Korea Atomic Energy Research Institute)MC3.A04: Proton linac projectsInvited Talk (Invitation Only)
The 100 MeV proton linac at KOMAC has operated since 2013, providing irradiation services for materials, biomedical, semiconductor, and nuclear/basic science through four user beamlines. The accelerator comprises a 50 keV injector, 3 MeV RFQ, and DTL to 100 MeV. Major beamlines support multidisciplinary research, semiconductor radiation assessment, and isotope production, while a...
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Dr Ivan Podadera (Consorcio IFMIF-DONES España)MC3.A02: Ion linac projectsInvited Talk (Invitation Only)
Overview and current status of the IFMIF-DONES accelerator systems is presented.
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Chang-Ki Min (Pohang Accelerator Laboratory)MC2.A07: Synchrotron light sourcesInvited Talk (Invitation Only)
As part of the ongoing Korea-4GSR (Fourth-Generation Synchrotron Radiation) project, a 200 MeV electron linac is being developed based on an S-band photocathode, rather than the conventional thermionic gun approach. The gun provides high electron energy (4 MeV) and low emittance, which simplifies the design of the initial accelerating RF system, magnets, and beam transport to the booster. The...
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Dr Olivier Napoly (Fermi National Accelerator Laboratory)MC3.A04: Proton linac projectsInvited Talk (Invitation Only)
The PIP-II Project is under construction to provide the Fermilab Accelerator Complex with a new H- SRF linac and beam transfer line delivering 800 MeV protons at Booster injection at double energy and double intensity (6.7x1012 proton per 20 Hz pulse) in comparison with the present Linac.
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The design goals of PIP-II Linac will be described, including delivering 1.2 kW beam power on LBNF/DUNE... -
Haitao Ren (Oak Ridge National Laboratory)MC4.A07: Room temperature RFInvited Talk (Invitation Only)
The first Radio-Frequency Quadrupole (RFQ01) at the Spallation Neutron Source (SNS) operated in both the main accelerator and the Beam Test Facility for a combined period of approximately 20 years. Over this time, the performance of RFQ01 declined significantly, with beam transmission decreasing from about 90% to 70% or less. RFQ01 is currently undergoing a comprehensive post-mortem analysis....
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Keitaro Kondo (National Institutes for Quantum Science and Technology)MC3.A02: Ion linac projectsInvited Talk (Invitation Only)
The Linear IFMIF Prototype Accelerator (LIPAc), jointly developed by Europe and Japan, aims to validate the acceleration of a 125 mA deuteron beam in continuous‑wave operation up to 9 MeV. In the 2024 campaign, LIPAc achieved a major milestone by demonstrating high‑duty RFQ operation with a 119 mA deuteron beam and a duty cycle approaching 10%, marking the highest‑performance operation to...
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Dr Aodhan McIlvenny (Lawrence Berkeley National Laboratory)MC1.A04 Plasma and wakefield accelerationInvited Talk (Invitation Only)
Multi-stage coupling of two or more laser-plasma accelerators is as a key technology for future high-energy physics applications of plasma-based accelerators, including TeV-scale collders. Single laser-plasma accelerators stages have demonstrated accelerating gradients orders of magnitude beyond conventional RF technology, high beam quality, and acceleration to 10 GeV. However, scaling to...
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Takao Asaka (National Institutes for Quantum Science and Technology)MC2.A07: Synchrotron light sourcesInvited Talk (Invitation Only)
NanoTerasu is a highly brilliant synchrotron light source mainly focusing on soft to tender X-ray region. The NanoTerasu compact accelerator system with high performance consists of a storage ring with a circumference of 349 m and a 3-GeV linear accelerator with length of 110 m. The linear accelerator is designed not only for full energy injection to the storage ring, but also for future...
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Dr Chaojie Zhang (University of California, Los Angeles)MC1.A04 Plasma and wakefield accelerationInvited Talk (Invitation Only)
(based on recently published Nat. Commun. 16, 10719 (2025)).
Demonstrating that a plasma-wakefield accelerator operating in the nonlinear regime acts as a transformer to simultaneously boost the energy and brightness of an electron bunch injected from the plasma. Using a 10-GeV drive bunch and a three-stage meter-scale plasma source, electron bunches exceeding 20 GeV with sub-percent energy...
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Teng Tan (Institute of Modern Physics, Chinese Academy of Sciences)MC3.A02: Ion linac projectsInvited Talk (Invitation Only)
IMP is constructing two major projects near Huizhou. Both involve the installation of superconducting hadron linacs with equipment that has been developed by IMP over the last decade or more. The presentation should summarize progress on the two projects.
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Daniel Gonnella (SLAC National Accelerator Laboratory)MC2.A02: Electron linac projectsInvited Talk (Invitation Only)
SLAC is engaged in an upgrade for the LCLS-II SC linac, the LCLS-II-HE project. The presentation should give an update of progress including summary of CM production and testing and schedule for installation and commissioning.
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Frederic Chautard (Grand Accélérateur Nat. d'Ions Lourds)MC3.A02: Ion linac projectsInvited Talk (Invitation Only)
The NEWGAIN (NEW GAnil INjector) project is now in the construction phase at GANIL. This major upgrade, driven by the integration of the new ASTERICS superconducting ECR ion source, aims to expand the capabilities of the SPIRAL2 accelerator by enabling the acceleration of heavy ions with an $A/q$ ratio of up to 7. With this enhancement, SPIRAL2 will provide high-intensity beams ranging from...
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Yong Liu (High Energy Accelerator Research Organization)MC3.A04: Proton linac projectsInvited Talk (Invitation Only)
Charge-exchange injection using H⁻ beam enables high-intensity proton accumulation in rapid cycling synchrotrons and storage rings. As a result, high-power H⁻ linacs are indispensable for modern pulsed neutron sources and high-energy physics facilities.
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Compared with proton linacs, H⁻ linacs are intrinsically susceptible to loss induced by electron stripping. Intra-beam stripping (IBSt) is a... -
Marten Koopmans (European Spallation Source)MC4.A07: Room temperature RFInvited Talk (Invitation Only)
The ESS linac has been commissioned in two different operation phases operation on the 12 kW commissioning beam dump. In 2025 the linac was operated at full duty cycle in the NCL section (up to 90 MeV) and at reduced duty cycle in the SCL section (up to 870 MeV), due to limitations in the cooling infrastructure and staged implementation of LLRF functionalities. In the present phase the while...
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Katja Honkavaara (Deutsches Elektronen-Synchrotron DESY)MC2.A04: FELsInvited Talk (Invitation Only)
DESY’s superconducting linac based FLASH free-electron laser (FEL) has undergone a fundamental transformation as part of the FLASH2020+ project. After a 14-month shutdown to implement external seeding, FLASH has been back in operation since August 2025, delivering a powerful new set of capabilities to its user community.
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Deepak Raparia (Brookhaven National Laboratory)MC3.A03: Other proton/ionInvited Talk (Invitation Only)
Abstract
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The Brookhaven National Laboratory (BNL) 200 MeV Drift Tube Linac (DTL) operates at 6.67 Hz, delivering H⁻ beams for both the polarized proton program at RHIC and isotope production at BLIP. Over the past two decades, targeted upgrades—especially within the low-energy and medium-energy beam transport (LEBT and MEBT) sections—have dramatically enhanced linac performance. Beam...
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